package Assignment10;

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.layout.StackPane;

import javafx.scene.layout.HBox;

import javafx.scene.layout.BorderPane;

import javafx.scene.paint.Color;

import javafx.scene.shape.Circle;

import javafx.stage.Stage;

public class ControlCircle extends Application {

private CirclePane circlePane = new CirclePane();

Button btEnlarge = new Button("Enlarge");

Button btShrink = new Button("Shrink");

@Override // Override the start method in the Application class

public void start(Stage primaryStage) {

// Hold two buttons in an HBox

HBox hBox = new HBox();

hBox.setSpacing(10);

hBox.setAlignment(Pos.CENTER);

hBox.getChildren().add(btEnlarge);

hBox.getChildren().add(btShrink);

// Create and register the handler

btEnlarge.setOnAction(new EnlargeHandler());

BorderPane borderPane = new BorderPane();

borderPane.setCenter(circlePane);

borderPane.setBottom(hBox);

BorderPane.setAlignment(hBox, Pos.CENTER);

//

btShrink.setOnAction(new EnlargeHandler());

borderPane.setCenter(circlePane);

borderPane.setBottom(hBox);

BorderPane.setAlignment(hBox, Pos.CENTER);

//Create a scene and place it in the stage

Scene scene = new Scene(borderPane, 200, 150);

primaryStage.setTitle("ControlCircle"); // Set the stage title

primaryStage.setScene(scene); // Place the scene in the stage

primaryStage.show(); // Display the stage

}

class EnlargeHandler implements EventHandler<ActionEvent> {

@Override // Override the handle method

public void handle(ActionEvent e) {

if (e.getSource() == btEnlarge)

circlePane.enlarge();

else

circlePane.shrink();

}

}

/**

* The main method is only needed for the IDE with limited

* JavaFX support. Not needed for running from the command line.

*/

public static void main(String[] args) {

launch(args);

}

}

class CirclePane extends StackPane {

private Circle circle = new Circle(50);

public CirclePane() {

getChildren().add(circle);

circle.setStroke(Color.BLACK);

circle.setFill(Color.WHITE);

}

public void enlarge() {

circle.setRadius(circle.getRadius() + 2);

}

public void shrink() {

circle.setRadius(circle.getRadius() > 2 ?

circle.getRadius() - 2 : circle.getRadius());

}

}